Device for preventing formation of burs in electric welding.



W. A. KILMBR & A. T. WEAVER.

DEVICE FOR PREVENTING FORMATION OF BURS IN ELECTRIC WELDING.

APPLICATION FILED AUG. 23, 1912.

1,087,383. Patented Feb. 1?, 1914.

2 SHBBTSSKEET 1.

W. A. KILMER & A. T. WEAVER. DEVICE FOR PREVENTING FORMATION OF BURS IN ELECTRIC WBLDING.

' APPLICATION FILED AUG. 23, 1912.

1,087,383. Patented Febr17, 1914.

2 sums-8mm 2.

UNITED STATES PQENT OFFICE.

WILLIAM A. KILMER, or m.- KALB, arm ALBERT weaves. or JGLIET, rumors, assronons TO THE AMERICAN seam. & wmn COMPANY or new JERSEY, or HOBOKEN, new JERSEY, A, CORPOBATION or NEW JERSEY.

DEVICE FOR PREVENTING FORMATTON F BURS ZN ELECTRIC"WELDIN G.

Specification of Letters Patent.

Patented Feb. 1?, 19M.

Application filed August 23, 1912. Serial No. 718,621.

To aZZ whom it may concern:

Be it known that we, \VILLIAM A. KILMER and ALBERT T. WEAVER, citizens of the United States, residing at De Kalb, in the county of Dekalb and State of Illinois, and J oliet, in the county of Will and State of Illinois, respectively, have invented certain new and useful Improvements in Devices for Preventing Formation of Burs in Elec-- trio \Velding, of which the following is a specification.

In the practice of uniting iron and steel articles by electric welding it is co-nmon to clamp the two parts in engagement, then cause the metal to be fused. Simultaneously one of the clamping jaws is moved toward the other, thus displacing a quantity of the fused metal, this metal adhering to the surface of the article and causing an unevenness or bur.

\Ve have devised and show in the accompanying drawings a machine arranged whereby the formation of the bur is prevented, thus obviating the necessity of removing the bur after the operation.

\Ve a. 2 aware that machines have been devised for removing the bur but believe it is new to prevent the formation of a bur during the welding operation. A machine arranged to accomplish this result is shown in our copending application Serial No. 716,692, filed August 1 3, 1912.

The invention will be more readily under-- stood by reference to the accompanying drawings, wherein,

Figure 1 is a side elevation of a machine constructed and arranged whereby the bur is prevented from forming; Fig. 2 is a plan View of the same machine; Fig. 3 is an enlarged detail end elevation of the oscillating clamping jaw; Fig. 4; is a section on the line 44- of Fig. 3; Fig. 5 is side elevation of a modification of the construction shown in the preceding figures; Fig. 6 is a plan view thereof, and, Fig. 7 is a section on the line 77 of Fig. 5.

Referring more particularly to the drawings it will be seen that we provide a base l.0, having a guide 11 projecting from the upper portion. thereof. Two sets of clamping aws are dovetailed onto the guide 11,

these clamping jaws being mounted in a frame 12-, having a housing 13, carrying a vertically adjustable bearing member 14,

on which the upper clamping jaw 15 is fulcrumed. The bearin member 1 is adj est able by means of the unit 16. The clamping aws ust described. are those to the left when viewing the machine from the front; that s, the upper clamp of Fig. 2. This clamp including the frame is arranged for adjustment with reference to the base 10, but is rigidly held in service. The bottom clampmg jaw 17 is rigid, the upper jaw being the clamping member. The actual clamping portions as shown in Fig. 4, are the. down wardly and upwardly projecting portions 18, 19 respectively, each carrying a semicircular groove 20 therein. Secured to the ends of the clamping jaws 15, 17, are brushes or auxiliary clamps 21, 22.

longitudinally by means of set bolts 25. The holders are mounted for oscillation in the arc-shaped slots 26, 27, formed in the ends of the jaws 15, 17. Short shafts or proections-28, 29 on the holders extend through the slots 26, 27 and guide the holders in an oscillating movement with the groove 20 as a center. The two holders are adapted for movement in unison by means of a connect ing pin or rod 30, loosely mounted mono or both of the holders in order to provide for the separation of the jaws as'requir'ed.

In order to oscillate the b ushes we provide a power shaft 31, having gram 32 thereon. This cam has a plurality of projcctions 38 thereon. An anti-friction roll 34-, mounted on a link 35, which link is connected 'to a rocker 36 and a further link 37, transmits motion to the upper shaft 28, on the holder 23. It will be seen by the .ar rangenient of the cams 33, that a plurality of oscillatory motions is imparted to the brushes.

Two face cams 38, keyed to shaft 31, provide the means in connection with the links 39, for raising and lowering the jaws as required. This is fully explained in our copending application hereinbefore referred to.

The other of the two clamping jaws is adapted for slight movement relative to the length of wire in the machine. This motion may be automatic or manual. We have shown in the accompanying drawings manually operable means such as the handle 40, for advancing the jaws to upset the metal at the point of fusion. It will be understood These are carried 1n the holders 23, 24a and are adjustable,

memes two ends the Wire 1%., shown in pleced in'coniect st point with imits of the brushes or Wipers As ic current. is applied and the e in are fused, the oscillation of t. e brushes, occurring during the fusing perioc, compresses or Wipes the surplus of metal tr in the Wll'fl, thus supplying the finished pr uct at the end of the Welding operation.

in Figs. to 7 inclusive We have shown a snnilsr construction except that the brushes do not oscillate, The elements of the clampin jaws remain the same as in the prece figures, but in the end of the left hand jaws as viewed from the front we mount brushes 1:1, placed alongside the clamps 1-2. Means such as the set bolts 43' are provided for the adjustment of the brushes or clamps. In operation the two ends of the WEB to be united Will meet within the limit of the brushes 4;]. andgthe In e 'evice of the class described, the combination of two sets of Welding clamps,

a pair of brushes interposed between said clamps ind adapted to surround the productnt-the point of weld, and means for rotating Sli'id brushes transversely of the Wire, substantially as described.

2. in a device for preventing the formation of burs in electric Welding, the coxnhination of a pair of clamps for holding the Wire to be Welded, brushes mounted between said clamps, means for seg isroting said brushes to permit the entrance of the separated ends of Wire to be welded, and Inc-ans for causing rotation of said brushes through at fixed arc transversely of the wire, substantially as described.

3. In a. device of the class described, the combination of clamps for holding the wire to be welded, brushes mounted between said clamps, said brushes when in operating po sition presenting an opening substantially the exact size of the Wire to be welded,-

nieans for causing relative separation of said brushes, and means for causing limited. rotation of said brushes transversely of the Wire, substm'ltially as described.

WllLLIl-ili'l A. KILM'ER. ALBERT T. WEAVER.

Witnesses to signature of William A. Kilmer:

T. H. Hones, Lo'r'r JENKINS. Witnesses to signature of Wemer:

JAMES Sins, MAn'rm 'W. Smrnwron.

Albert T. 

